Cooler for cream and other liquids



Aug. 31 1926.'

E. D. BERRY COOLER FOR CREAM AND OTHER LIQUIDS Filed Nov. '7, 1924 Patented uga 31, 1926.

UETED STATES EDWIN DANIEL BERRY, OF PALMERSTON NORTH, NEW ZEAREl COOLER FOR CREAM AND OTHER LQUIDS.

Application filed November 7, 1924, Serial No. 748,471, and in New Zealand February 16, 19.24.

This invention relates to a new and improved construction of cooler, employing'. humid ammonia gas as the cooling medium, that has been devised specially for use in dairy factories and like places for the cooling of cream after Pasteurization. The construction devised is however suitablefor the treatment of other liquids and also for the employment of other fluid cooling agents than the ammonia gas referred to.

In this invention provision is made for the cream or other liquid, while passing through the cooler, being entirely enclosed so that it cannot be affected by surrounding atmospheric conditions, as is the case with the surface coolers generally used in similar` circumstances. It is generally conceded that cream while cooling becomes absorbent to the surrounding; air conditions and as these sometimes are charged with fumes or odours that are deleterious to the cream, the cream is liable to be affected thereby. With this invention in use therefore, this liability is removed.

Provision is also 4made in the construction of the cooler, for the cream and the cooling medium flowing side by side throughout a` continuous zigzag course and in the same direction, so that the cream at its highest temperature comes und-er the influence of the cooling medium at its lowest temperature, and thus especially in the case of ammonia 5cas as the cooling medium, any liability of freezing taking place to check the flow is obviated, and moreover the cooling operation carried on right throughout the course of the liquid.

The invention consists in a special construction of appliance whereby these results are obtained and embodies special details of construction by the employment of which important advantages in the working and general care and oversight of the cooler, are obtained.

' These general features and details of construction are shown in the accompanying drawings and will be hereinafter fully eX- plained in relation thereto.

In such drawings Figure l is an end elevation of the cooler.

Figure 2 is a side elevation thereof showing portion of an insulated casing broken away.

Figure 3 is an enlarged sectional elevation showing the manner of forming the joint between two of the tubular elements of the cooler.

The cooler as made in accordance with thisinvention is. formed by a number of jacketed tubular elements arranged to eX- tend inparallel lines one above the other between vertical end frames or standards A, each of such elements being formed by an internal tube B and an outer jacket tube C. The ends of the internal tubes B of each element are carried out through the respective end frames A' and the adjacent ends are then connected together by semicircular unionsD so arranged relatively at both ends of the cooler that a continuous zig-zag .passage is obtained from Vone end of the bottom tube B throughout all of the tubes in turn to the end of the top tube. Each end is titte-d to connect with pipes through which the cream supply is led into the bottom tube and is carried away from the top tube, the flow through the series being maintained by pumping or other desired power.

Y Each jacket tube C, at each end of the element is closed in around the tube B by drawing or otherwise, and the several jack- -et tubes of the series are connected together by unions E obtained by welding or otherwise, disposed near their ends so that one continuous zigzag course is obtained from the end of the lowest jacket corresponding to the inlet end of the lowest tube B, through all ofthe jackets in turn, to the end of the Vtopmost jacket corresponding to the outlet end of the highest tube B.

An inlet nozzle F is provided in the end of the vbottom element jacket through which the ammonia supply is led, and an outlet G of the required larger diameter leads from the end of the top element jacket, and in practice may be fitted with a pressure gauge.

Thus the cream to be cooled may be sent along` within the 'tubes B while the cooling medium is caused to travel in the same direction within the surrounding jackets, in order to cool the cream to the required de- Oree. f by Each elementvis bent upwards in a slight curve from both ends to its middle so that any moisture left within the tubes will drain towards the ends. This is particularly of advantage with the inner cream tubes B as preventing the accumulation of matter therein and facilitating the cleaning of the tubes with hot water and the draining away of any residue. The end to end bending of the elements will also provide for the expansion and contraction of the tubes brought -:about by the conditions governing tlreusefo'f the cooler, Without affecting the joints with which the tubes B are connected to the end frames A.- The inner tube B is also Apreferably given less arch from" end to end "than lthe 'outer jacket in order that it may bend upwards to a greater extent and'still vleave a clear annular space between the tube and the jacket.

The unions l) are so secured `in position to connect the respective ends of the tubes B that 'they inay'be readily removed and.

' end C is formed. 'The union D at leach end of the semi-circular pas'sage'through it,

' is formed with a shoulder D that is made Vto enter the socket end of the tube C, such end then engaging a shoulder D2 -formed around the vfirst mentioned shoulder'. A`

suitable rubber ory like packing washer kH is arranged upon this shoulder. On each side of the union a flange J is formed to project laterally outward such flange having a slot J extendingv in from its edge. On the outer side of the frame A a number of bolts K are hinged so 'that 'two are provided for each union, one von each side thereof. Each bolt is designed'to vbe turned out to enter the slot J of the correspondl ing flange J and isfprovided with Va wing nut screwed on to its end, which by engaging the flange on the edges of the slot, will cause the union tobeforced in hard upon .the ends of the tubes B with a rubber Y Washer between to make the required liquid.

tight joints therewith. Vhen the nuts are loosened, the bolts may be turned out to free the unionso that the union may then be removed.

The appliance Vthus made will have its sides covered in by casing plates M extending ybetween the end trames A and the space between packed with any approved insulating 'medium that rwill serve to conserve the cooling effect of the cooling medium upon the cream.

I claim l. A cooler-of the class described, com- .prising Vend frames, inner tubes connecting -said end ffra'mes and extending through 'openings therein, jacket tubes each associated with one of said inner tubes and of greater diameter than said inner tubes, said jacket :tubes having diametrically reduced j ends fitted 'around saidv inner tubes, said inner tubes having reverselj7 folded ends eX- tending around and fitted on the ends 'of the .jacket tubes, unions connecting the inner tubes in pairs and connections between the jacket tubes. y

2. A cooler of the class described, comprising end frames, inner tubes connecting said end frames and extending through openings therein, jacket tubes each associated with one of said inner tubes and of greater diameter than said inner tubes, said lj'acke't 'tubes having 'diainetrically reduced ends fitted around said inner tubes, said inner tubes having reversely folded `ends eX- tendin'g around and 'fitted on the ends of 'the jackettubes, unions connecting the inner tubes in pairs, said unions 'having shouldered ends fitted 'in 'theends of said inner tubes and packing Washers on said 'shoul- Vdered ends of 'said unions and between the same rand the reversely y'folded ends of the inner tubes.

i In testimony whereof, I affix my signature.

EDWIN DANIEL BERRY. 

